Improvement in sewing and embroidering machines



3 Sheets-Sheet 1. G. STAOKPOLE & J. H. APPLEGATE. Sewing and Embroidering Machine.

No. 220,314. Patented Oct. 7, 1879.

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3 Sheets-Sheet 2. G. STAOKPOLE & J. H. APPLEGATE. Sewing and Embroidering Machine.

No. 220,314. Patented Oct. 7,1879.

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1 3 Sheet sSheet 3. G. STAOKPOLE & J. H. APPLEGATE. Sewing and Embroidering Machine.

No. 220,314. Patented Oct. 7,1879.

N.FETERS. PHDTD-LITMOGRAFHEH. WASHINGTON. D C,

UNITED STATES PATENT OFFICE.

GREENLEAF STAOKPOLE, OF ELIZABETH, NEW JERSEY, AND JOHN H. APPLEGATE, OF REVERE, MASSACHUSETTS.

IMPROVEMENT IN SEWING AND EMBROIDERI NG MACHINES.

Specification forming part of Letters Patent No. 220,3 [4, dated October 7, 1879; application filed June 10, 1879.

To all whom it may concern:

Be it known that we, GREENLEAF STACK- POLE, of the city of Elizabeth, in the county of Union and State of New Jersey, and JOHN H. APPLEGATE, of the town of Revere, in the county of Suffolk and State of Massachusetts, have jointly invented certain new and useful Improvements in SewingMachines, which improvements are fully set forth in the following specification and accompanying drawings, in which- Figure 1 is a side elevation of our improved machine. Fig. 2 is a top view, showing the top of arms and frame. Fig. 3 is a top view of the lower part of our machine on line as :r of Fig.- 1. Fig. 4 is a view of the front end of our machine. Fig. 5 is a view of the back end thereof. Fig. 6 is a top view of the front end of the bed-plate.

The object of our invention is to produce a sewing-machine that will make two lines of stitches at the same time, and weave threads across from one line of stitches to the other, for the purpose of uniting and covering the cut edges of cloth, thereby making a flat seam.

Our invention consists in the application to a two-needle sewing-machine of a set of threadcarriers above the cloth-plate, and a set of thread-carriers below the cloth-plate, for carrying threads across from one line of stitches to the other and interlocking them therewith;

. also, in the combinations of devices hereinafter described and claimed.

In the accompanying drawings, A is the sta' tionary arm. On one side of this arm is hung a vibrating arm, B, and on the oppposite side of said arm is hung a vibrating arm, E.

M isthe main shaft, upon which is an eccentric, F. A pitman, Gr, connects saideccentric to the arm B, thereby giving to said arm a vibrating motion, for the purpose of communicatingmotion to the needle-bar O, to which it is attached.

A supplementary shaft, H, is placed paral lel with the main shaft, and connected thereto by gears I and J, of such relative dimensions as to revolve it at a speed equal to one-half the speed of the main shaft M. On the supplementary' shaft H is an eccentric, F, and a pitman, G, connects said eccentric with the arm E, causing said arm to vibrate at one-half the speed of the needle-arm B. This arm E is for the purpose of giving motion to a bar, e, in the head of the machine to which it is connected.

A strap, h, connects the bar 0 to a cam, Z, which, in combination with a spring, b, gives avibrating motion to the thread-carriers L and K, for carrying threads across from one line of stitches to the other, and interlocking said threads with the stitches on the upper side of the material operated upon.

A counter-shaft, Q, is connected to the for; ward end of the main shaft M by beveled gears N and P, of such relative dimensions as to re volve said counter-shaft at a speed equal to one-half the speed of the main shaft. On said counter-shaft Q is a cam, P, which, in combination with a spring, a, gives a vibrating motion to the thread-carriers W and W, which are for the tfttwcr'arrymgtnraasacmss from one line of stitches to the other, and interloekin g them bel ow the material operated upon.

T319 needles, D and D, are attached to the needle bai "'U.' Said needles operate in combination with twgloopers, U and U, on shafts T and T. Said shafts receive their motion from the counter-shaft Q by means of gears S and S and R and R, of such relative dimensions as to cause the shafts T and T to revolve at the same speed as that of the main shaft M.

That part of the cloth-plate through which the holes are cut for the needles to pass is cut so as to form a ton 'g e, n, between the needles. I

The end of the ongue is rounded, and a space, m, left between it and the plate, to permit the cross-threads to pass as the work is fed along, after the cross-threads have been interlocked with the two lines of stitches under said clothplate.

We also provide a uide-plate to attach to the cloth-plate in fr n o the needles, to guide two pieces of cloth, one piece under each nee dle, their edge s neetingbetween the needles, but beih'g'prev'ented from lapping by the upright part of the guide, so that when the crossthreads are interlocked, with the stitches on both the upper and under sides of the cloth, I the edges of the cloth are covered and united smoothly and firmly together.

It is obvious that the mechanism for carrying threads across and interlocking the same with two lines of stitches may be as readily applied to a shuttle or lock-stitch machine as to the loop or chain stitch machine here shown.

What We claim is 1. The main shaft M and supplementary shaft H, with the eccentrics F and F and pitlnen G and G, in combination with the vibrat ing arms B and E, bar 0, strap h, cam Z, threadcarriers L and K, spring I), needle-bar and needles D and I), substantially as and for the purpose set forth.

2. The combination of the shafts T and T, gears S and S,loopers U and U, shaft Q, gears R and 1t, cam 1, main shaft M, beveled gears P and N, thread-carriers 'and W, and spring a,substantially as and for the purpose set forth.

3. The combination, with the stitch-forming mechanism of a sewing-machine adapted to form two parallel rows of stitches at one and the same time, of the two vibrating threadcarriers L and K, arranged above the clothplate, the two vibrating thread-carriers W and W, arranged below the cloth-plate, and mechanism for operating said parts with respect to one another, whereby the threads carried by the thread-carriers L and K are interlocked with the threads carried by the stitch-forming mechanism above the surface of the material operated upon, and the threads carried by the thread'carriers W and W are interlocked with the same below the said material, substantially as and for the purpose set forth.

4. The combination, with the two needles D and D, the two loopers U and U, the two vibrating thread-carriers L and K, arranged above the cloth'plate, the two vibrating threadearriers W and W, arranged below the clothplate, and mechanism for imparting to said parts the necessary movements, of a cloth-plate provided with a tongue, n, arranged with relation to the said needles, all as and for the purpose set forth.

GREENLEAF STACKPOLE. JOHN H. APPLEGATE. Witnesses:

A. IIURI), E. l. BRIGGS. 

